Edger



(No Model.) 2 Sheets- Sheetl 1.

J. A. ROBB.

EDGER.

No. 258,946. Patented June 6,1882.

num 1 mmm .1.

N PETERS Pimm mlwgmpxm. whnmnxun. D. C.

(No Model.) 2 Sheecs--Sheet 2. J. A. ROBB.

BDGER.

No. 258,946. Patented June 6, 1882.

UNITED STATES PATENT OEEICE.

JAMEs A. noch, or sAN JosE, oALiEoENrA.

EDGER.

SPECIFICATION forming part of Letters Patent No. 258,946, dated June 6, 1882.

Application filed January 4, 1882.

To all whom t't may concern:

Be it known that I, JAMEs A. ROBE, of Sau Jos, in the county of Santa Clara, in the State of California, have made and invented certain new and useful Improvements in Edgers, and I do hereby declare that the following is a full, clear, and exact description of the same, refereuce being had to the accompanying drawings.

This invention relates to certain improvements in the saw setting and adjusting devices and the feed-roll mechanism embraced in the Letters Patent of the United States No. 227 ,926, granted to me on the 25th day of May, 1880.

The first part of the present improvement consists of a novel construction of the sawsetting levers and in the manner of attaching to them their operating-handles.

The second part ot' the improvement consists in mechanism for lifting the upper feedroll of each set.

In the accompanying drawings herein referred to, Figure 1 shows a front elevation of the machine-frame with the feed-rolls and the mechanism for raising the upper one ot' each set. Fig. 2 is a view taken from the left-hand side of Fig. l. Fig. 3 shows the shifting-box and the foot-levers for throwing it into one or the other of the friction-wheels to bring the frictional-pulley shaft into action with either lifting mechanism. Fig. et is a cross-section through the saw-shaft and the slotted beam or support for the setting levers. This view shows the general construction of a lever and its application to the saw. Fig. 5 is a top view of Fig. 4. Figs. 6, 7, 8, 9, and l() show parts in detail.

A A are the end frames of the machine, and B is the saw-shaft. D D are the two sets of feed-rolls, one in front ot'and the other behind the saws. E is a ily-wheel on the shaft of the lower roll of each set, and F F are the sliding boxes for the journals of the upper rolls. The general arrangement and operation of these parts are substantially the same as in my former patent before referred to; but instead of the rack-andpinion device therein employed to produce the required lifting movement of the journal-boxes from the rotation of the fric tion-wheel shafts, I now substitute and use a disk, g, on the end of the shafts It, with a wrist- (No model.)

pin, i, from which an upright connection-rod, J, is carried to and attached at its upper end on the side of the journal-box F. ln my former construction of such lifting device much annoyance and difficulty was experienced from the clogging and filling up of the racks and pinions with the sawdust produced by the machine. There was considerable interference with the proper lifting of the rolls and a liability besides of breaking out teeth in both parts. This construction, however, is entirely free from these objections, and is a great improvement in point of simplicity and freedom from clogging while at work.

The shafts h, carrying the disks g, are rotated by means of the friction-wheels k andthe shaft L in the same manner as in my former construction before mentioned; but for moving the shifting-box m to throw the shaft l toward one or the other of the friction-wheels, I have arranged and combined a simple and more et'- fective means, consisting of a rock-shaft, N, with an upwardly-projecting arimp, the end of which is connected to the sliding box m by a link, r, and a foot-lever, S, fixed in the rockshaft N, and projecting forward at the front of the machine. The inner end of this lever S is pivoted at t to a secondary lever, S', which also extends forward parallel with the first lever, S, and is pivoted at n to the machine-frame. The levers S S lie inside of the frame, and the lever S is attached to the rock-shalt N there. This rock-shaft N extends out through the framing, and has the arm p attached to its end. Now, by depressing the first lever, S, the rock- Shaft N will be turned in a forward direction and the shifting-box m will bring the pulley of the shaft in contact with the frictioual wheel of the front shaft. This will operate the disk g and raise the top roller of the front set of feed-rolls; or, by pressing down the secondary lever S the inner end of the lever S will be drawn down, and the box m will be moved toward the friction-wheel of the rear shaft by the rotation given to the shaft by the lever S. This movement of the lever S' will cause the upper roll ofthe rear set of feed-rolls to rise for the admission of the ends of the boards. These two levers S S are so weighted or balanced that when pressure of the foot is taken offeither one they will return to the horizontal,

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or in such position as to bring thejournalbox fm. back into place midway between the friction-wheels.

In this machine I have arranged the sawshaft below the line of the feed-rolls, so that the slotted beam T, carrying the setting-levers, can be brought lower down at the front of the frame and in more oonvenientposition for handling and workin g the levers. The slotted beam is pivoted at u to the frames A A, so that by turning it downward and outward the ends of the setting-levers are all disconnected from the saws and brought out of the way of the shaft and its saws. Each setting-lever is made of an L-shaped arm, the upright member of which extends upward at one side of the saw, and has a removable nose-piece, L', to enter and work in the groove of the saw-collar while the horizontal member L2 rests in the slot through the beam, and has the handle l? secured on its forward end. To tix the handle on the end of the lever I provide an enlarged end or box through which, from side to side, I form a T- slot. Then, by means of a screwthreaded shank on the handle, and two clamp-nuts,q g, one to work within the slot and the other on the outside, I fix the handle securely in place. By simply loosening the outer nut the handle can be shifted horizontally to one side or the other ofthe line of the lever, and any decrease and increase in the amount of "offset" required for the width of board being cut can be quickly obtained.

In my former construction of settiug-leveis, the amount of offset being previously deter* mined for each saw of the gang, the handles were iiXed permanently to the ends of the lcvers in the required position, and could not be adjusted to alter the amount of offset. llIy present improvement provides for adjustment of each handle, so that the number of saws on the shaft can be diminished and increased again at any time, according to the work rcquired to be done, as the adjustability of the lever-handles admits of a ready change in the amount of offset for each saw. This is clearly shown in Figs. 4 and 5.

The detachable nose L' is secured by a tapbolt, n', to the end ot' the upright part of the setting-lever, and its concave end rests in the groove of the collar. On the other side of the same part of the lever I secure the sawdustspout R by the two small bolts 0 o. The inner edges have the adjustable stops or saw-guides G G, which consist of the pins-G,'movable in holes through the sides of the spout, and held in place, when adjusted at proper distance apart, by means of the set-screws g. The spout and its application are clearly shown in Figs. 5, 8, 9, and 10.

The detachable nose-piece L' consists of two plates laid together and held in place by the bolt n', and also capable of being spread apart laterally, to increase the width ot' the nose where it rests in the groove of the saw-collar. This separation of the plates is for the purpose of taking up any loose play created by wear of the surfaces ruiming in contact, and it is produced by the small screws 2 3 4, which are carried through one plate and bear against the opposing face ot' the other plate. Thus by setting up these screws the two plates can be spread apart more or less, as required, to compensate for the wear of the collar or the sides of the nose running in the groove. By means of these screws I also separate and slightly spread apart the upper edges of the plates, so as to form a small groove or channel along the upper edge of the nose and at the concave end, where it bears in the collar, to serve as a receptacle and a conductor for lubricating substances. Over this channel I provide for holding a lubricator composed ot' fibers of cotton or wool to apply and retain oil or lubricating matter at the surface of the nose and the groove in which it works. This holder consists of the clamp and screw W, and by means of it the fibers or lubricating` medium is held on the edge of the nose and against the concave end. In this manner I provide a very simple and an effective means of keeping these parts constantlylubricated, and reducing the wear and friction at the end of the settinglevers.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. Ina gang-edger, the combination, with the upper feed-rolls journaled in sliding boxes F, of the shafts lz., with their friction-wheels, the disks gj g, having wrist-pins i, the connection-rods J J, the shaft with friction-pulley L, and mechanism, substantially as herein described, for shifting or laterally throwing one end of said shafts toward either ot' the said shafts G G, for the purposes set forth.

2. The combination, with the shifting-box on, of the rock-shaft N, fixed arm, and link a', the lever S in said rockshaft, and the secondary lever S', pivoted at t to the frame, and having the inner end of the lever S attached to it at a point in front ot' its fulcrum, substantially as described.

3. The combination of the slotted bar T with the end of the settin g-lever L, havin g the T-slot, the handle with a threaded shank, and the nuts q g', sdbstantially as described.

4. In combination with the setting-lever L, the detachable nose-piece L', formed of two plates, which are provided with a spreading or setting means whereby they are moved from each other and held in such position, substantiall y as and for the purpose set forth.

5. The detachable nose-piece for the ends of the setting-levers in edgers, consisting of the two separable plates L' and the separating-screws 2 8 4, by which the upper edges of the plates can be spread and held apart to a greater extent than the lower portion thereof, in combination with grooved saw-collars, substantially as described, for the purposes set forth.

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6. In combination with the grooved saw-coling the adjustable saw-stops G G, substanlars and the separable plates L', forming the tially as described. nose-piece, as described, the clamp W and lubricator material, applied substantially as de- I JAMES A' ROBE' 5 scribed, for the purpose specified.

7. In combination with the upright end of the setting-lever L, the sawdust-spout; R, havin si Witnesses:

EDWARD E. OsBoRN, GEO. VINCENT. 

